CN202216364U - Intelligent network energy-saving control system for central air conditioner - Google Patents
Intelligent network energy-saving control system for central air conditioner Download PDFInfo
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- CN202216364U CN202216364U CN2011202943806U CN201120294380U CN202216364U CN 202216364 U CN202216364 U CN 202216364U CN 2011202943806 U CN2011202943806 U CN 2011202943806U CN 201120294380 U CN201120294380 U CN 201120294380U CN 202216364 U CN202216364 U CN 202216364U
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- water
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Abstract
The utility model relates to the technical field of refrigeration equipment, in particular to an intelligent network energy-saving control system for a central air conditioner, which comprises a frozen water host machine, a water cooling tower and an intelligent controller, wherein a host machine control cabinet of the frozen water host machine is connected with the intelligent controller by a network cable in a communicated way; a diverter valve is arranged on a loop formed among a compressor, an evaporator and a condenser; a frozen water outlet flow sensor arranged on a frozen water output pipeline of the evaporator as well as a frozen water flow sensor and a return frozen water temperature sensor which are arranged on a frozen water return pipeline of the evaporator are used for transmitting signals into the intelligent controller; the intelligent controller is also connected with an outdoor temperature and humidity sensor and an outdoor wet bulb sensor; a fan of the water cooling tower is controlled by a frequency converter which is controlled by the intelligent controller; and an outlet cooling water temperature sensor and a return cooling water temperature sensor are respectively arranged on a circulation loop between the water cooling tower and the condenser. The intelligent network energy-saving control system for the central air conditioner is simple in structure, scientific and reasonable, low in investment cost, simple and convenient in operation and good in energy conservation.
Description
Technical field
The utility model relates to technical field of refrigeration equipment, refers in particular to the control system of central air-conditioning.
Background technology
Central air conditioner system is a huge high-energy equipment colony; Lot of statistics result shows; The electric energy that air-conditioning system consumed accounts for the total power consumption about 18% of full company; With regard to any architectural design, selecting air-conditioning system for use all is to choose type by the required refrigerating capacity of hot weather in locality, and leaves the surplus about 15%.In the running of central air-conditioning, along with the variation of load, system conditions will depart from the optimum operation interval of air-conditioner host, cause the main frame conversion efficiency to reduce.Add up according to interrelated data; The central air-conditioning unit has is born in running time of 90% non-fully loaded running status; And chilled water pump; Cooling water pump and water tower blower fan 100% oepration at full load state still in this time of 90% all can not be according to actual cooling load variations and its power output of corresponding proportion increase and decrease, has so just caused " the big little temperature difference of flow " and has frozen the phenomenon that the temperature difference of water and cooling water can't be effectively controlled.Simultaneously, the water leaving water temperature that freezes of common handpiece Water Chilling Units all is set at about 7.0, can not be according to the variation of outdoor temperature humidity and the water leaving water temperature that freezes of real time altering handpiece Water Chilling Units is set, so cause a large amount of electric energy to waste.
At present; Central air conditioner system all can not be in running along with the increase and decrease of cooling load respective change; The system actual operating mode of making far departs from the optimal operating condition of system; Thereby cause whole central air conditioner system efficient to reduce, this is the insurmountable a great problem of conventional central operation of air conditioner mode always.
Summary of the invention
It is a kind of simple in structure, scientific and reasonable that the purpose of the utility model is to provide, and makes easily, is prone to management and control, has the central air-conditioning intelligent network energy-saving control system of splendid Energy Saving Control.
For achieving the above object, the utility model adopts following technical scheme:
Central air-conditioning intelligent network energy-saving control system; Include chilled water main frame, cooling tower, intelligent controller; The chilled water main frame has compressor, host computer control case, evaporimeter, condenser and diaphragm valve; The host computer control case carries out communication through grid line and intelligent controller and is connected, and diaphragm valve is installed on the loop that forms between compressor, evaporimeter and the condenser; The water delivery pipe road of freezing in evaporimeter is provided with out and freezes water flow sensor, and is provided with and freezes water flow sensor and reach back and freeze water temperature sensor in the water return pipeline that freezes of evaporimeter; Go out to freeze water flow sensor, freeze water flow sensor and reach back and freeze water temperature sensor and transmit signal and give intelligent controller, intelligent controller also is connected with the outdoor temperature humidity sensor and the outdoor wet bulb degree sensor of outdoor mounted; The blower fan of said cooling tower is through Frequency Converter Control, and frequency converter is controlled by intelligent controller; On the closed circuit between cooling tower and the condenser, be separately installed with out cooling-water temperature sensor and return cooling-water temperature sensor, go out cooling-water temperature sensor and return cooling-water temperature sensor connection of intelligent controller.
Further improve in the such scheme and be: on the closed circuit of cooling tower and condenser, draw one the tunnel and get cold loop; This is got cold loop and is connected to a heat-exchangers of the plate type through a proportioning valve after the water intaking of the output of cooling tower and carries out cold and hot exchange, and the backwater output of heat-exchangers of the plate type inserts the backwater end of cooling tower.
The refrigerant of said heat-exchangers of the plate type comes from the chilled water that central air-conditioning produces.
Described intelligent controller also is connected with computer through Ethernet or industrial network.
After adopting said structure; The utility model can be realized handpiece Water Chilling Units, chilled water pump; Cooling water pump and water tower blower fan can be according to cooling load and the real-time respective change of outdoor temperature humidity; Go to control the operation of central air conditioner system according to system's optimal operating parameter, improved the efficiency of energy utilization (COP value) of system, thereby reached the energy-conservation purpose of whole system.
The utility model advantage again is that it is simple in structure, and scientific and reasonable, cost of investment is low, and the operation operation is easy, and Maintenance and Repair are very convenient, improved the energy-saving run rate and the operability of central air conditioner system greatly.
Description of drawings:
Accompanying drawing 1 is the structural principle sketch map of the utility model.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is further specified:
Consult shown in Figure 1; System is the sketch map of the preferred embodiment of the utility model; The relevant central air-conditioning intelligent network of the utility model energy-saving control system includes chilled water main frame 1, cooling tower 2, has the intelligent controller 3 that calculates the comparison processing capacity, and chilled water main frame 1 has compressor 11, host computer control case 12, evaporimeter 13, condenser 14 and diaphragm valve 15; Host computer control case 12 carries out communication through grid line with intelligent controller 3 and is connected; Intelligent controller 3 can provide and drive signal to host computer control case 12, also can obtain the inner parameter of main frame simultaneously, like percentage of current and chilled water return water temperature etc.Diaphragm valve 15 is installed on the loop that forms between compressor 11, evaporimeter 13 and the condenser 14; The water delivery pipe road of freezing in evaporimeter 13 is provided with out and freezes water flow sensor 131, and is provided with and freezes water flow sensor 132 and reach back and freeze water temperature sensor 133 in the water return pipeline that freezes of evaporimeter 13; Go out to freeze water flow sensor 131, freeze water flow sensor 132 and reach back and freeze water temperature sensor 133 and transmit signals and give intelligent controller 3, intelligent controller 3 also is connected with the outdoor temperature humidity sensor 4 and outdoor wet bulb degree sensor 5 of outdoor mounted; The blower fan of said cooling tower 2 is through frequency converter 21 controls, and frequency converter 21 is by intelligent controller 3 controls; On the closed circuit between cooling tower 2 and the condenser 14, be separately installed with out cooling-water temperature sensor 22 and return cooling-water temperature sensor 23, go out cooling-water temperature sensor 22 and return cooling-water temperature sensor 23 connection of intelligent controllers 3.Intelligent controller 3 also is connected with computer 8 through Ethernet or industrial network, can realize dynamically showing and control and management automatically that through computer 8 automaticity is high, has the remote monitoring effect.
Shown in Figure 1; On the closed circuit of cooling tower 2 and condenser 14, draw one the tunnel and get cold loop; This is got cold loop and is connected to a heat-exchangers of the plate type 7 through a proportioning valve 6 after the water intaking of the output of cooling tower 2 and carries out cold and hot exchange, and the backwater output of heat-exchangers of the plate type 7 inserts the backwater end of cooling tower 2.The refrigerant of heat-exchangers of the plate type 7 comes from the chilled water that central air-conditioning produces.Like this, utilize getting cold loop and can freely getting coldly of the utility model in the winter time, can find out from above schematic diagram, cooling water can flow into heat-exchangerss of the plate type 7 through proportioning valve 6 and carry out cold and hot exchange in the winter time.Because system can change handpiece Water Chilling Units and cooling tower carries out cooling automatically according to outdoor wet-bulb temperature, thereby possesses automatic free cold supply ability.Promptly when cooling water temperature is lower than the temperature of required chilled water, can produce chilled water through heat-exchangers of the plate type 7 exchanges.For example; Need 7 ℃ chilled water; By board-like heat exchanger heat transfer temperature difference is 2 ℃, and the cold width of cloth of cooling tower is 4 ℃ of operating modes, through the cooling tower intelligence control system calculate outdoor wet-bulb temperature must must ≦ 1 ℃ just can produce 7 ℃ of cold water; Cooling tower intelligence control system capable of using like this, is in the winter time got cold energy-conservation.Otherwise and mutually, when cooling water temperature is higher than the temperature of required chilled water, also can reduce cooling water temperature through heat-exchangers of the plate type 7 exchanges.
The energy conservation of the utility model is following:
1, freezing unit is energy-conservation
Can find out from the schematic diagram of Fig. 1; Intelligent controller 3 according to outdoor temperature humidity sensor 4 with outdoor wet bulb degree sensor 5 and go out to freeze water flow sensor 131, freeze water flow sensor 132 and return and freeze water temperature sensor 133 and transmit coherent signals; Through intelligent controller 3 computings; Transmit the information of freezing leaving water temperature adjustment then to chilled water main frame 1 through grid line according to predefined program; Chilled water main frame 1 is according to the relevant flow of adjusting its diaphragm valve 15 in real time automatically of specifying, thus change chilled water leaving water temperature; Be connected through grid line between intelligent controller 3 and the host computer control case 12 simultaneously and carry out communication, obtain the inner parameter of main frame, like percentage of current and chilled water return water temperature etc.Can guarantee that through intelligent controller 3 air-conditioner host is in optimum Working; Make main frame remain at higher thermal conversion efficiency interval; Solve traditional chilled water unit effectively and departed from a difficult problem that turns round under the optimal design duty; Improve the efficiency of energy utilization (COP value) of chilled water unit, thereby reached the main engine energy-saving purpose.
Facts have proved that outdoor temperature humidity changes; Freeze then respective change of water leaving water temperature; Though chilled water temperature is established to such an extent that set 7.0 ℃ high than tradition, workshop moisture temperature is still normal fully, and this is because original freezing temperature is set too low (only need adapt to bad weather be used for cool-down dehumidification).Practice is proof also, 1 ℃ of the every raising of chilled water leaving water temperature, and the efficient of handpiece Water Chilling Units will increase about 3%.The factor that influences the adjusting of chilled water leaving water temperature has the ambient temperature and humidity and the chilled water return water temperature temperature difference; Promptly non high temperature high humidity season and the return water temperature temperature difference on the low side when less than normal the chilled water leaving water temperature can establish higherly; Can guarantee that like this air-conditioner host is in optimum Working; Make main frame remain at higher thermal conversion efficiency interval; Solved traditional chilled water unit effectively and departed from a difficult problem that turns round under the optimal design duty, improved the efficiency of energy utilization (COP value) of chilled water unit, thereby reached the main engine energy-saving purpose.
2, the chilled water water circulating pump is energy-conservation
Intelligent controller 3 is according to data such as the temperature of the water outlet of chilled water pipeline, backwater, pressure, outdoor temperature humidity, current refrigeration dutys; Calculate the temperature difference and pressure difference; Go out best running frequency according to calculation of parameter such as its temperature difference and pressure reduction then and offer chilled water pump; Make and freeze water system and remain maximum temperature difference, and chilled water pump can be according to actual cooling load variations and its power output of corresponding proportion increase and decrease, thereby it is energy-conservation to reach chilled water pump.
3, the cooling tower blower fan is energy-conservation
As can beappreciated from fig. 2; The coherent signal of outer Temperature Humidity Sensor 4 of intelligent controller 3 receiving chambers and outdoor wet bulb degree sensor 5 transmission; And according to this coherent signal through calculating wet-bulb temperature; Transmitting the information of cooling tower blower fan frequency adjustment according to predefined program to frequency converter 21 then, frequency converter 21 is adjusted its cooling tower blower fan frequency in real time automatically according to relevant the appointment, thereby changes the cooling tower rotation speed of fan.The benefit of the utility model is: when leaving water temperature approaches the outdoor wet-bulb temperature+cold width of cloth; Explanation cooling tower under this outdoor air condition has reached maximum heat dispersion; How many leaving water temperatures again blower fan of cooling tower of opening can not or reduce not more; Will adjust the running of cooling tower blower fan in this case, reach and blow in machine less or reduce rotation speed of fan and energy-conservation.
4, the cooling water cycle water pump is energy-conservation
Intelligent controller 3 is according to data such as the temperature of the water outlet of cooling water pipeline, backwater, pressure, outdoor temperature humidity, current refrigeration dutys; Calculate the temperature difference and pressure difference; Go out best running frequency according to calculation of parameter such as its temperature difference and pressure reduction then and offer cooling water pump; Make cooling water system remain maximum temperature difference, and cooling water pump can be according to actual cooling load variations and its power output of corresponding proportion increase and decrease, thereby it is energy-conservation to reach cooling water pump.
The utility model makes whole system coordinated operation, thereby realizes better synthesis energy saving through to unified controls comprehensively such as each link of air-conditioning system such as freezing unit, chilled water pump, cooling water pump, blower fan of cooling tower.
In sum, the central air-conditioning intelligent network energy-saving control system that provides of the utility model has following advantage:
1. energy-saving effect is remarkable
After installing central air-conditioning intelligent network energy conserving system (BNS) additional, can reduce significantly and freeze water main frame, refrigerating water pump, coolant pump, blower fan of cooling tower energy consumption; Energy-saving effect is very surprising; The integrated power-saving rate reaches more than 20%; Mainly be that central air conditioner system equipment can be exported its power in real time in proportion according to outdoor temperature humidity, cooling load, thereby reduced the central air-conditioning energy consumption that this intelligent network energy-saving control system is applicable to is newly-built, in all central air conditioner systems of reconstruction.
2. increase and decrease main frame or main frame timing start-up and shutdown automatically
Automatically increase and decrease main frame, chilled water pump according to the load needs, cooling water pump and water tower blower fan quantity or rotating speed, thus realize automatic energy saving.
3. adopt the remote computer monitoring
Adopt the power output of remote computer monitoring frequency converter, output frequency, output current, output voltage, main frame, refrigerating water pump, the running status of cooling tower.
4. has warning function
Have warning function, can report to the police the various conditions that preestablish.
5. stand-by pump adding system takes turns automatically and changes jobs
Stand-by pump adds the automatic wheel of system and changes jobs, and makes each pump work time even, prolongs the pump working life-span.
6. the refrigerating water pump automatic time delay is shut down
Behind the main shut-down system, system's refrigerating water pump automatic time delay was shut down in 5 minutes, made full use of the chilled water cold that retains in the pipeline, and all water pumps use frequency converter to eliminate pipeline water and beat effect.
7. energy-saving effect is realized unattended equipment room
This system adopts intelligent total management, avoids manually-operated unreliability, is equivalent to ask an air-conditioning expert to manage central air-conditioning.
Claims (4)
1. central air-conditioning intelligent network energy-saving control system; Include chilled water main frame (1), cooling tower (2), intelligent controller (3); Chilled water main frame (1) has compressor (11), host computer control case (12), evaporimeter (13), condenser (14) and diaphragm valve (15); It is characterized in that: host computer control case (12) carries out communication through grid line with intelligent controller (3) and is connected, and diaphragm valve (15) is installed on the loop that forms between compressor (11), evaporimeter (13) and the condenser (14); The water delivery pipe road of freezing in evaporimeter (13) is provided with out and freezes water flow sensor (131), and is provided with and freezes water flow sensor (132) and reach back and freeze water temperature sensor (133) in the water return pipeline that freezes of evaporimeter (13); Go out to freeze water flow sensor (131), freeze water flow sensor (132) and reach back and freeze water temperature sensor (133) and transmit signal and give intelligent controller (3), intelligent controller (3) also is connected with the outdoor temperature humidity sensor (4) and the outdoor wet bulb degree sensor (5) of outdoor mounted; The blower fan of said cooling tower (2) is through frequency converter (21) control, and frequency converter (21) is controlled by intelligent controller (3); On the closed circuit between cooling tower (2) and the condenser (14), be separately installed with out cooling-water temperature sensor (22) and return cooling-water temperature sensor (23), go out cooling-water temperature sensor (22) and return cooling-water temperature sensor (23) connection of intelligent controller (3).
2. central air-conditioning intelligent network energy-saving control system according to claim 1; It is characterized in that: on the closed circuit of cooling tower (2) and condenser (14), draw one the tunnel and get cold loop; This is got cold loop and is connected to a heat-exchangers of the plate type (7) through a proportioning valve (6) after the water intaking of the output of cooling tower (2) and carries out cold and hot exchange, and the backwater output of heat-exchangers of the plate type (7) inserts the backwater end of cooling tower (2).
3. central air-conditioning intelligent network energy-saving control system according to claim 1 is characterized in that: the refrigerant of said heat-exchangers of the plate type (7) comes from the chilled water that central air-conditioning produces.
4. central air-conditioning intelligent network energy-saving control system according to claim 1 is characterized in that: intelligent controller (3) also is connected with computer (8) through Ethernet or industrial network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011202943806U CN202216364U (en) | 2011-08-15 | 2011-08-15 | Intelligent network energy-saving control system for central air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202943806U CN202216364U (en) | 2011-08-15 | 2011-08-15 | Intelligent network energy-saving control system for central air conditioner |
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| CN202216364U true CN202216364U (en) | 2012-05-09 |
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| CN2011202943806U Expired - Fee Related CN202216364U (en) | 2011-08-15 | 2011-08-15 | Intelligent network energy-saving control system for central air conditioner |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878655A (en) * | 2012-11-06 | 2013-01-16 | 安徽日源环保能源科技有限公司 | Central air-conditioning dynamic water temperature control system and control method thereof |
| CN103968509A (en) * | 2013-01-25 | 2014-08-06 | 肖才新 | Intelligent energy-saving system of central air conditioner |
| CN104534917A (en) * | 2014-12-24 | 2015-04-22 | 深圳孚沃德斯科技有限公司 | Energy-saving control device and method for closed cooling circulation system |
| CN106051960A (en) * | 2016-05-18 | 2016-10-26 | 江苏天纳节能科技股份有限公司 | Cooling tower group cold and hot water mixed-using system for central air conditioner cooling and plate heat exchanger free cooling and using method thereof |
| CN106610063A (en) * | 2017-01-09 | 2017-05-03 | 贵州绿云科技有限公司 | Modularly-designed double-cold-source integrated cooling station system |
| CN107741111A (en) * | 2017-11-07 | 2018-02-27 | 珠海格力电器股份有限公司 | Handpiece Water Chilling Units and its startup control method and device |
| CN109863356A (en) * | 2016-09-02 | 2019-06-07 | 江森自控科技公司 | System and method for the control of vaporation-type heat-removal equipment fan speed |
| CN112013606A (en) * | 2020-08-12 | 2020-12-01 | 浙江天旭机电设备有限公司 | Novel cooling water station |
| CN112665443A (en) * | 2020-12-25 | 2021-04-16 | 北京首都机场动力能源有限公司 | Cooling tower control method and system for central air-conditioning system |
| CN113819593A (en) * | 2021-08-16 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner refrigerant flow control method and device and air conditioner |
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2011
- 2011-08-15 CN CN2011202943806U patent/CN202216364U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878655A (en) * | 2012-11-06 | 2013-01-16 | 安徽日源环保能源科技有限公司 | Central air-conditioning dynamic water temperature control system and control method thereof |
| CN103968509A (en) * | 2013-01-25 | 2014-08-06 | 肖才新 | Intelligent energy-saving system of central air conditioner |
| CN104534917A (en) * | 2014-12-24 | 2015-04-22 | 深圳孚沃德斯科技有限公司 | Energy-saving control device and method for closed cooling circulation system |
| CN106051960A (en) * | 2016-05-18 | 2016-10-26 | 江苏天纳节能科技股份有限公司 | Cooling tower group cold and hot water mixed-using system for central air conditioner cooling and plate heat exchanger free cooling and using method thereof |
| US11280511B2 (en) | 2016-09-02 | 2022-03-22 | Johnson Controls Technology Company | Systems and methods for evaporative heat rejection equipment fan speed control |
| CN109863356A (en) * | 2016-09-02 | 2019-06-07 | 江森自控科技公司 | System and method for the control of vaporation-type heat-removal equipment fan speed |
| CN106610063B (en) * | 2017-01-09 | 2019-03-08 | 贵州绿云科技有限公司 | A kind of double cold sources of modularized design integrate cold station system |
| CN106610063A (en) * | 2017-01-09 | 2017-05-03 | 贵州绿云科技有限公司 | Modularly-designed double-cold-source integrated cooling station system |
| CN107741111A (en) * | 2017-11-07 | 2018-02-27 | 珠海格力电器股份有限公司 | Handpiece Water Chilling Units and its startup control method and device |
| CN107741111B (en) * | 2017-11-07 | 2023-06-30 | 珠海格力电器股份有限公司 | Water chilling unit and start control method and device thereof |
| CN112013606A (en) * | 2020-08-12 | 2020-12-01 | 浙江天旭机电设备有限公司 | Novel cooling water station |
| CN112013606B (en) * | 2020-08-12 | 2024-01-30 | 浙江天旭机电设备有限公司 | Novel cooling water station |
| CN112665443A (en) * | 2020-12-25 | 2021-04-16 | 北京首都机场动力能源有限公司 | Cooling tower control method and system for central air-conditioning system |
| CN113819593A (en) * | 2021-08-16 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner refrigerant flow control method and device and air conditioner |
| WO2023019946A1 (en) * | 2021-08-16 | 2023-02-23 | 青岛海尔空调器有限总公司 | Air conditioner refrigerant flow rate control method and apparatus, and air conditioner |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20160815 |